On Wed, Jun 12, 2013 at 4:00 PM, Peter Eisentraut <
peter_e@gmx.net> wrote:
>
>
> I'm wondering where "IF NOT EXISTS" and "OR REPLACE" will meet.
>
> For example, why doesn't your list include CREATE FUNCTION?
>
> I have on my personal todo list to add "OR REPLACE" support to CREATE
> AGGREGATE and CREATE OPERATOR. They are kind of like functions, after
> all, and CREATE OR REPLACE FUNCTION is clearly widely useful.
>
> I suppose both could be useful, but if we're going to make sweeping
> changes, perhaps that should be clarified.
>
I did not include "CREATE FUNCTION" precisely because I had the same doubts.
IMO the "IF NOT EXISTS" and "OR REPLACE" are differents, and can coexists in
the same statements but not used at the same time:
CREATE [ OF REPLACE | IF NOT EXISTS ] FUNCTION ...
I can use "IF NOT EXISTS" to "CREATE" a {FUNCTION | AGGREGATE | OPERATOR}
without replace (OR REPLACE) its definition to just create missing objects and don't
raise an exception if already exists.
